MIC26950

MIC26950 12A Hyper Speed ControlTM Synchronous DC-DC Buck Regulator SuperSwitcher IITM General Description The Micrel MIC26950 is a constant-frequency, synchronous buck regulator featuring a unique digitally modified adaptive ON-time control architecture. The MIC26950 operates over an input supply range of 4.5V to 26V and provides a regulated output at up to 12A of output current. The output voltage is adjustable down to 0.8V with a typical accuracy of ±1%, and the device operates at a switching frequency of 300kHz. Micrel’s Hyper Speed ControlTM architecture allows for ultrafast transient response while reducing the output capacitance and also makes (High VIN)/(Low VOUT) operation possible. This digitally modified adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device. The MIC26950 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include undervoltage lockout to ensure proper operation under power-sag conditions, internal soft-start to reduce inrush current, fold-back current limit, “hiccup” mode shortcircuit protection and thermal shutdown. All support documentation can be found on Micrel’s web site at: www.micrel.com. Features Hyper Speed ControlTM architecture enables - High delta V operation (VIN = 26V and VOUT = 0.8V) - Small output capacitance 4.5V to 26V input voltage Adjustable output from 0.8V to 5.5V (±1% accuracy) A...